Brake for electric-motor-operated machines.



I y I I v WITA/ES s 76 INVENTOI? M. TAIGMAN. 4 BRAKE FOR ELECTRIC MOTOR OPERATED MACHINES.

APPLIOATION FILED MAR. 24, 1913.

' v nun- 2& 4 I

' Max Bay/21am I Ana/Mrs Patented Dec. 2, 1913.

UKTE i MAX TAIGMA'N, OF NEW YOBK, H. Y.

BRAKE FOR ELECTBIG-MOTOR-OIERATED MAGHINEQ.

Specification of Letters Patent.

Patented Dec. 2, 1913.

Application filed March 24, 1913. Serial No. roe 1.19.

To all whom it may concern:

Be it known that I, Mix Talents, a citizen of the United States, and a resident of the city of New York, borough of Main hattan, in the county and State of New York, have invented a new and Improved Brake for Electric-liftotzor-Operated Machines, of which the following is afull. clear, and exact description.

The present invention relates to improvements in brakes-of the character mentioned, and more particularly to brakes combined with a starting box for'an clcctri'c-motor, or operated in unison therewith, and has among its principal objects, to unify the con'ibined elements and to simplify the construction and arrangement of the parts formingthe connective structure between the two principal elements. r

A further object contemplated by the present invention is to arrange the connective structure to permit the ady'ustment thereof to various installation contitions.

\Vith these objects in view, the invention consists in providing a pivot for the brake lever supported upon the casing'ot' the starting box, and in providing a series of pivoting connective structures adapted for adjustihcnt to vary.- the location of the brake pivot relative'the casing, to accommodate the location of the brake pulley.

It further consists in constructing and arranging the supporting members for said pivot to vary the operative brake shoe to accommodate the brake pulley.

'One embodiment of the present invention is shown in the accompanying drawings, in

i wh i ch- Figure 1 is a perspective view of a starting box, a brake lever operatively connected therewith, and a pivot supporting connecting structure therefor; Fig. 2 is a cross section taken on the lihe 2-2 in Fig. 1,-showing the starting-box case, the mechanism being removed; Fig. dis a detail view. on an enlarged scale, showing one of the looking members for the cover of the starting box.

.\s seen in the accompanying drawlogs, the starting box is provided with integrally-formed upwardly'extending supporting brackets 8. Each bracket is pro shown in Fig.

position of the the location of vided with a screw-hole 9, adjacent one end thereof, and an open-ended slot ll), atv the other end thereof. The arrangement of the holes 9 and slots 10, both of which are provided to receive bolts or other suitable fastoning members, permits of an'adjustmcnt in placing said. box on any standing structure, such as a work bench or machine stand. box is employed to contain a'suitable rheostat or other electric-current-controlling nu-chauisni operable by a starting lever ll. The mechanism within the box is exposed when the cover 1; is removed therefrom.

To hold the cover 12 in position a curved dowel pin 1.3 is formed integral with said cover, to enter a socket perforation l4- tormcd in the upper side of the box (see Figs. 1 and of the drawings). The cover 12 is l1eld in position bya spring clip 15;, which is rigidly mounted on the under side of the l')()X,'{il')(l is provided at the forward end with an inclined apron 16, the lower edge of the cover 12 passes, to deflect the spring, when moving to its seat, of the drawings. To support its weight, the cover 12 is provided with a spur t7, shaped to override and bear upon the inner surface oi the under side oi said box, when held by the hook shoulder at the junction of the spring clip in and the apron 16 thereof.

The starting lever 11 is normally support ed by a coil spring 18. To anchor the ends of the spring 18. the bracket 8 adjacent the lever ll is provided with a flange it) having a perft'iration 20, through which an end of the spring is inserted or hooked. The op posite end of the spring 18 is extended around the uppermost of the books .21, which hooks a re extended from the opposite edges oi the lever 11. The lever 11 may thus be inserted within the-starting box, so that 7 books 21 may be engaged by if in the installation it becomes necessary to invert the box from the position shown in Fig, l, the spring 18 could be reversed and draw upon the hook 2t opposite to that with which it] is shown either of the the spring 18, or

as engaged, the opposite enl of said spring.

being anchored to the standing structure. It will be noted that, 'in the event of such reversion, arrangement would of necessity be made within the starting box. so that the over which lever 11 would rest its circuit contact onthe neutral or deed post of the starting box, when moved thereto by the spring 18. v

The starting lever 11 is connected directly with the brake lever by means of arounded rod-like extension '23 and an enlarged circular aperture formed in the exposed end or" said lever. The relative variation in size of the extension 23 end the aperture 24 admits of varying the operative angles of the brake lever fila'reletive the starting lever 11, Without cramping,

At the extreme end of the lever 11, s. second aperture is provided to receive the hoot: end 26 oils connecting rod 27. Said rod is usuelly connected to a foot tresdle, upon which the operator presses when start ing the motor for his machine. By opera. tively connecting the starting lever 11 and the brake lever 22, thepulley 28 of the driving mechsnism for s machine is released simulteneously vvith the'sterting of the motor supplied from the starting box described.

The location of the pulley 28 nmv be such to'require adjustment of the brake lever 22 relstive thereto, in order that a. hrsite shoe 529 may grip the wheel favorably. For this purpose the bracket shafts 30 end 31 are sliclably and rotstively mounted inbearings formed in aboss 32 and it link block 33.

The bearings for the shafts 30 and 31 in the link block are perpendicularly disposed each to theother, and spaced apart lengthwise of said block. By'specing the shaft 83 from the shaft 30, ssid shaft 31 is permitted to rotate about the center of the shaft '30, to accommodate any desired arrengement for spivot arm 34. The pivot arm 34: carries a pivot pin 35, upon which the brake lever 22 fulcrums. I

Normally, a set screw 36 holds rigidly the shaft .30. W hen said set screw 36 is looscoed, the shaft 30 may be moved lengthwise the boss 32, to extend or retract the service position oft the link block 33. The link block 33 is held rigid on the shaft 30 by a set screw 37. When the set screw 37 is released, the block 33 may be rotated in themanner above described. When a. set screvv'38 is released, the shaft 31 may be rotatedjn the block 33, or drawn length- Wise therefrom or retracted therethrough.

Having a connective structure to support the brake lever 22, the operation is es follows :When. the starting box and broke "ere installed, suitable fastening devices are inserted through the perforations 9 and the slots 10. The set screws 37 snclBS srethen loosened to release the shafts 30 and 31. the adjustment of the lever 22 'to a position avorable for the operation of the brake shoe QUn'rmy noivbe freely'mede. 'The link block 33 being movable lengthwise of ,tlie

be longitudinally or laterally varied.

e osses? sl1aft'30. and the shaft 3i being slidable withinthc link block 33, the pivot the service positions of the starting box and pulley 28 are angularly related, this is accommodated by rotating the link block on the shaft 30. If the service location of the starting box and pulley 28 varies perpex'ulicularly, this may be accommodated by rotating the pivot arm ill and the shaft 31 connected therewith, in the block Whenever the favored operative position is atmined, the shafts 30 and 31 and the arm'll l connected therewith, are located fixedly in position by setting up the screws 37 end 38.

Having thus described my invention, 1 claim as new and desire to secure by Letters Patent 1. In combination, a starting box for electric motors; a starting lever mounted therein; a. brake lever opcratively connected withsaid starting lever; pivot arm having an elongated pivot shaft and a Eulcruin for said brake lover; a link block pivotully mounted on said box-g and means for fastening said pivot shaft in said link block pivot arm and fuland at the opposite end an elongated pivot shaft; a boss mounted on said box, bored substantially parallel to said brake lever; a bracket shaft slidebly mounted in said bore; and means pivotally uniting said bracket shaft and said pivot shaft.

3. In combination, a starting box for electric motors; a starting lever mounted therein; a brake lever operstively connected. with said starting lever; a pivot arm, hav ng at one end :1 fulcrum for said lever and at the opposite end an elongated pivot shaft; a boss mounted on said box, bored substantialiy parallel to said broke lever; a bracket shaft slidebly mounted in'said bore; a, pivot block operstively' connecting said bracket shaft-and said pivot shaft, said block having a plurality of per'pendiculnrly-disposed bearings for said shafts; and fasteners mounted in said blo clg for fixing in adjusted relation s'aidshefts.

4. In combination, a startingbox for electric motors; a starting lever mounted therein; a brake lever operstively connected. with sflidstertin lever; a pivot arm having at one ends 15 lcrum for said lever and at the opposite end an elongated pivot shaft; a boss mounted on said box, bored. substmb tialiy parallel to said brake lever; a. bracket she t slidsbly mounted in said bore; e pivot Mock opm'ntively connecting said bracket name 116 (his spmrcifimitiun m the pmsem-u of shaft and sand pu'ot shaft, suld block lmvhm subscnlnng \YKUHfSSkY'S.

mg n mu'nhty of porpemlxcularly-thslmscd W M l I bcurmgns 1'01 said shafts; and a plurality of LXHLNKAN' HM sg'rmvs mounted in said pivot block to fix \Vitnosscs; m ad usted posztlon sand sha'fls thermal. .15. I.".\1uunum 311 tvstinmny wherwrf I have slgned my I lmmv D. RnLmLms. 

